Tech Musings

May 27, 2026 · Backend Development

How to Upload Images to Qiniu Cloud with Rust + Actix‑Web and Generate Signed Download URLs

This article walks through moving image storage from TiDB Cloud to Qiniu Cloud for a WeChat mini‑program, detailing a Rust + Actix‑Web backend that validates image format, deduplicates via SHA‑256 content‑addressable keys, creates upload tokens, performs idempotent multipart uploads, and builds hour‑aligned private download URLs with referer protection.